Chlorophyll

import warnings
warnings.filterwarnings("ignore")

import os
import os.path as op
import sys

import pandas as pd
import numpy as np
import geopandas as gpd
import cartopy.crs as ccrs
import matplotlib.pyplot as plt

sys.path.append("../../../../indicators_setup")
from ind_setup.plotting_int import plot_timeseries_interactive
from ind_setup.plotting import plot_base_map, plot_map_subplots
from ind_setup.core import fontsize

sys.path.append("../../../functions")
from data_downloaders import download_ERDDAP_data

Define area of interest

#Area of interest
lon_range  = [129.4088, 137.0541]
lat_range = [1.5214, 11.6587]

EEZ shapefile

shp_f = op.join(os.getcwd(), '..', '..','..', 'data/Palau_EEZ/pw_eez_pol_april2022.shp')
shp_eez = gpd.read_file(shp_f)

Download Data

base_url = 'https://oceanwatch.pifsc.noaa.gov/erddap/griddap/esa-cci-chla-monthly-v6-0.csv'
dataset_id = 'chlor_a'
date_ini = '1998-01-01T00:00:00Z'
date_end = '2023-12-01T00:00:00Z'

data = download_ERDDAP_data(base_url, dataset_id, date_ini, date_end, lon_range, lat_range)

data_xr = data.set_index(['latitude', 'longitude', 'time']).to_xarray()
data_xr['time'] = pd.to_datetime(data_xr.time)
data_xr = data_xr.coarsen(longitude=2, latitude=2, boundary = 'pad').mean()

ax = plot_base_map(shp_eez = shp_eez, figsize = [10, 6])
im = ax.pcolor(data_xr.longitude, data_xr.latitude, data_xr.mean(dim='time')[dataset_id], transform=ccrs.PlateCarree(), 
                cmap = 'Greens', vmin = np.percentile(data_xr.mean(dim = 'time')[dataset_id], 1), 
                vmax = np.percentile(data_xr.mean(dim = 'time')[dataset_id], 99))
ax.set_extent([lon_range[0], lon_range[1], lat_range[0], lat_range[1]], crs=ccrs.PlateCarree())
plt.colorbar(im, ax=ax, label='chlorophyll (mg/$m^3$)')

<matplotlib.colorbar.Colorbar at 0x17cf2ce30>

data_y = data_xr.resample(time='1YE').mean()
plot_map_subplots(data_y, dataset_id, shp_eez = shp_eez, cmap = 'Greens', vmin = np.percentile(data_xr.mean(dim = 'time')[dataset_id], 1), 
                vmax = np.percentile(data_xr.mean(dim = 'time')[dataset_id], 99), cbar = 1)

data_an = data_y - data_xr.mean(dim='time')
plot_map_subplots(data_an, dataset_id, shp_eez = shp_eez, cmap='RdBu_r', vmin=-.1, vmax=.1, cbar = 1)

Mean Area

dict_plot = [{'data' : data_xr.mean(dim = ['longitude', 'latitude']).to_dataframe(), 
              'var' : dataset_id, 'ax' : 1, 'label' : 'Chlorophyll - MEAN AREA'},]

fig = plot_timeseries_interactive(dict_plot, trendline=True, scatter_dict = None);

Given point

loc = [7.37, 134.7]
dict_plot = [{'data' : data_xr.sel(longitude=loc[1], latitude=loc[0], method='nearest').to_dataframe(), 
              'var' : dataset_id, 'ax' : 1, 'label' : f'Chlorophyll at [{loc[0]}, {loc[1]}]'},]

ax = plot_base_map(shp_eez = shp_eez, figsize = [10, 6])
ax.set_extent([lon_range[0], lon_range[1], lat_range[0], lat_range[1]], crs=ccrs.PlateCarree())
ax.plot(loc[1], loc[0], '*', markersize = 12, color = 'royalblue', transform=ccrs.PlateCarree(), label = 'Location Analysis')
ax.legend()

<matplotlib.legend.Legend at 0x182b478c0>

fig = plot_timeseries_interactive(dict_plot, trendline=True, scatter_dict = None);